Prophet is an open-source software for forecasting time series data, developed by Facebook's Core Data Science team. It uses an additive model with non-linear trends, seasonality, and holiday effects to produce accurate and fast forecasts. Prophet is robust to missing data and shifts in the trend, and typically handles outliers well. The tutorial demonstrates how to integrate Prophet with InfluxDB, a time series database, to make univariate time series predictions. The process involves querying InfluxDB, converting the results into a DataFrame, fitting the model using Prophet, making future forecasts, and writing the forecast to InfluxDB. The tutorial aims to demonstrate the integration of Prophet and InfluxDB and familiarize users with Prophet.